Accursed Witch // Infectious Curse [Shadows over Innistrad Remastered]

Spells your opponents cast that target this creature cost less to cast.
When this creature dies, return it to the battlefield transformed under your control attached to target opponent.

Enchant player
Spells you cast that target enchanted player cost less to cast.
At the beginning of enchanted player's upkeep, that player loses 1 life and you gain 1 life.